Rush keeps crashing

Hello I'm using Adobe rush for the first time (the basic app) in my iPad Air 4 to try it out. Up to now, I've used iMovie, but wanted to try rush. I will be creating more videos in the future for professional use.  I created my first video of about 175 MB in size. Contains videos and pictures taken with a DJI drone. When I sent the video for final rendering the app started doing its work  but about 88% of the way completed it crashed and took me to the iPad home screen. I tried again for several times with the same result. I even restarted the iPad and again the issue continues. Any ideas on why this is happening ? Thanks.